| 陈院真,司友斌,党菲,李敏,周东美.AgNP叶面和根系暴露对大豆(Glycine max L.xudou16)吸收及转运的影响[J].农业环境科学学报,2016,35(12):2285-2291. |
| AgNP叶面和根系暴露对大豆(Glycine max L.xudou16)吸收及转运的影响 |
| Effect of foliar and root exposure of AgNP on the uptake and translocation of soybean(Glycine max L. xudou16) |
| 投稿时间：2016-07-12 |
| DOI：10.11654/jaes.2016-0912 |
| 中文关键词: AgNP 大豆 吸收 转运 |
| 英文关键词: nanosilver soybean uptake transport |
| 基金项目:国家自然科学基金重点项目（41430752） |
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| 摘要点击次数: 2371 |
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| 中文摘要: |
| 为准确评估释放到农田生态系统中的纳米银（AgNP）对作物生长的影响，选取大豆（Glycine max L.xudou16）为对象，分别在叶面暴露、根系暴露以及叶面和根系综合暴露途径下连续14 d暴露AgNP（10 mg·L-1）及AgNO3（1 mg·L-1），考察大豆对AgNP及AgNO3的吸收和转运。研究结果发现：三种暴露途径下大豆新叶中积累的Ag为0.06~1.03 μg·g-1，单独叶面暴露下大豆根部积累的银为1.07~1.47 μg·g-1，表明AgNP能够被大豆吸收并发生转运。对比叶面暴露和根系暴露发现，根系暴露途径下Ag的迁移系数高于叶面暴露的迁移系数（64.5~140倍）；无论哪种暴露途径，AgNO3处理的迁移系数均大于AgNP处理（2.5~25倍），表明除了暴露途径的影响，Ag的形态（即AgNP或AgNO3）也会影响大豆新叶中Ag的积累。因此，在评估AgNP对农作物生长的风险时，应综合考虑其暴露途径和Ag的形态。 |
| 英文摘要: |
| In order to access accurately the impact of released AgNP on crops growth into the farmland ecosystem, a soybean(Glycine max L. xudou16) was treated as the testing plant, exposed by AgNP(10 mg·L-1) and AgNO3(1 mg·L-1) in routes of foliar, root and their combined exposure for 14 days respectively. Irrespective of exposure routes, Ag accumulation in new leaves(which were not exposed to AgNP) were 0.06~1.03 μg·g-1 in above three exposure routes, while Ag accumulation in roots were 1.07~1.47 μg·g-1 in foliar exposure route, indicating that AgNP could be taken up and translocated within the soybean. Compared with the transfer efficient of Ag by foliar exposure, those by root exposure were much higher(64.5~140 times). In all exposure routes, the transfer efficient of AgNO3 treatment was higher than that of AgNP treatment(2.5~25 times), suggesting that both the exposure route and the silver species(AgNP or AgNO3) affected the accumulation of Ag in soybean leaves. Consequently, both of the exposure route and Ag species should be concerned when accessing the risk of AgNP on crops groth. |
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